You are absolutely correct. It comes down to the evolutionary history of Earth throughout life's 4 billion year tenure on this planet. The climate has gone thr

You are absolutely correct. It comes down to the evolutionary history of Earth throughout life's 4 billion year tenure on this planet. The climate has gone through EXTREME changes [1][2], including the Chicxulub impact, which radically impacted the atmosphere's composition and life on this planet. Yet, the biosphere has always adapted and life continued. Assuming that mankind is destroying the biosphere at an unprecedented rate (we are), and burning hydrocarbons at an even faster rate (we are), are these two factors enough to turn the earth into a Mars-style wasteland, completely devoid of all life? Based on the data I`ve linked below, it just doesn't seem plausible. We can use linear regression models of the atmosphere and show temperatures rising until life becomes impossible, but that is not how complex biospheres work. In any case, climate science is definitely a worthy scientific discipline to study, but it is becoming akin to economics in the prediction department. As in, the principles are sound, but the predictions of the experts are laughably wrong on a regular basis, possibly due to the fierce politicization of this branch of science. 1. http://www.biocab.org/Geological_Timescale.jpg http://www.biocab.org/Geological_Timescale.jpg 2. http://earthguide.ucsd.edu/virtualmuseum/images/CO2History.html http://earthguide.ucsd.edu/virtualmuseum/images/CO2History.h...